You are the only one reporting so you have the inside track, what have the texts been about?
Craigs List generates a lot of text scams. Do you have anything posted on CL? And there are text romance scams, are you on any dating sites?
Of course, one way to look at it is if he is bothering you, that is enough for you to report the texts as spam and block the number.
ps - How do you know this is a guy?